OS Command Injection Vulnerability in Totolink A7100RU Router
CVE-2026-6026

9.3CRITICAL

Key Information:

Vendor

Totolink
Status
A7100ru
Vendor
CVE Published:
10 April 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-6026?

A security flaw has been identified in the Totolink A7100RU router, specifically within the CGI Handler component. The vulnerability, found in the setPortalConfWeChat function of /cgi-bin/cstecgi.cgi, allows for OS command injection through a manipulated argument. Attackers can leverage this flaw remotely, potentially leading to unauthorized command execution on the affected device. The exploit has been publicly disclosed, raising concerns about the security of devices using this firmware version.

Affected Version(s)

A7100RU 7.4cu.2313_b20191024

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-6026 - Proof of Concept

References

https://vuldb.com/vuln/356602
vdb-entrytechnical-description
https://vuldb.com/vuln/356602/cti
signaturepermissions-required
https://vuldb.com/submit/792047
third-party-advisory

CVSS V4

Score:
9.3
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

LtzHust (VulDB User)
.